:root {
  --blue-color:#3ca9f2;
}
body {
  background: #0f0e18;
  /* 让整个内容剧中 */
  display: flex;
  flex-direction: column;
  align-items: center;
}
.cell {
  display: inline-block;
  line-height: 7px;
  width: 6px;
  height: 6px;
  background-color: #2d2f42;
  border-bottom: solid 1px #0f0e18;
  border-right: solid 1px #0f0e18;
  vertical-align: bottom;
  /* transition: all 400ms ease; */
}
#container {
  padding-bottom: 1rem;
  display: flex;
  flex-wrap: wrap;
  width: 701px;
}

.help {
  color: var(--blue-color);
  display: flex;
  justify-content: space-between;
  width: 700px;
  align-items: center;
}

/* 为了更好看，加入了 button 的样式，可有可无！*/
button {
  background: transparent;
  /* border: none; */
  color: var(--blue-color);
  border: 1px solid aqua;
  padding: 0.5rem 1rem;
  cursor: pointer;
  transition: all 400ms ease;
}
button:hover {
  background: var(--blue-color);
  color: #333;
}


/* 文字 */
#text {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -100%);
  color: red;
  font-size: 36px;
}